<template>
    <div class="list" ref="wrapper">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div 
                    class="button-wrapper" 
                    v-for="item of hot" 
                    :key="item.id"
                    @click="handleCityClick(item.name)">
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div 
            class="area" 
            v-for="(item, key) of cities" 
            :key="key"
            :ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom"
                    v-for="innerItem of item" 
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                >
                    {{innerItem.name}}
                </div>
            </div>
        </div>
      </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
    export default {
        name: 'CityList',
        props:{
            hot:  Array,
            cities: Object,
            letter: String
        },
        computed: {
            ...mapState ({
                currentCity: 'city'
            })
        },
        methods: {
            handleCityClick (city) {
                this.changeCity(city)
                this.$router.push('/')
               // alert(city)
            },
            ...mapMutations (['changeCity'])
        },
        mounted () {
            this.scroll = new Bscroll(this.$refs.wrapper)
        },
        watch: {
            letter () {
                if (this.letter) {
                    const element = this.$refs[this.letter] [0]
                    //console.log(element)
                    this.scroll.scrollToElement(element)
                }
            }
        }
    }
</script>

<style lang="stylus" scoped>
  @import '~@/assets/styles/varibles.styl'
  .border-topbottom
    &:before
      border-color : #ccc
    &:after 
      boder-color : #ccc
  .border-topbottom
    &:before
      border-color : #ccc
  .list
    overflow hidden
    position : absolute
    top : 3.7rem
    left : 0
    right : 0
    bottom : 0
  .title
    line-height : 1.54rem
    background : #eee
    padding-left : .2rem
    color : #666
    font-size : .36rem
  .button-list
    overflow : hidden
    padding : .1rem .6rem .1rem .1rem
    .button-wrapper
      float : left
      width : 33.33%
      .button
        margin : .1rem
        padding : .1rem 0
        text-align : center
        border : .02rem solid #ccc
        border-radius : .04rem
  .item-list
    .item
      line-height : 2.14rem
      padding-left : .2rem
</style>